In court you need evidence to substanciate a claim, not just an assumption.
Contrary to supposed belief, Ivy isn't THAT easy. If she was, she would have been knocking boots with Small Dick Jeremy sooner than later, but that didn't happen, not to mention she would likely be telling Lena about her supposed conquests or people she "supposedly" was sleeping with.
Gonna happily wager that it will be found out that Axel and Ivy didn't sleep together, mainly on the reason that she wouldn't go that far for one, and two, she wouldn't want to ruin her relationship with Lena, because if she were to find out about it, in all likelyhood it would taint their relationship and break it. Lena's relationship with her is precious to her, despite how she acts and protrays herself.
So no, your supposed equation isn't 2+2=4 there. More like 6+9=420. But hey, I'm more than happy to be proven wrong in the upcoming chapters.